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Structural Steel and Precast Concrete Contractors

NAICS 238120 · Specialty Trade Contractors · SBA size standard: $19 million average annual receipts

Structural steel and precast concrete contractors fabricate, deliver and erect steel beams, columns, joists and precast panels for commercial, industrial and high-rise buildings. They receive engineer-stamped drawings, fabricate or stage members off-site or on-site, schedule crane and crew days, coordinate with general contractors and other trades, and maintain detailed erection logs, bolt torque records, weld inspections and material test reports. The specialists turn drawings into material orders and shop drawings, shop drawings into fabrication schedules, schedules into crane and erection sequences, and all into daily reports and billing quantities.

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What makes this business different

  • Engineer-stamped drawings and revisions that must be tracked by revision number and date
  • Fabrication and erection sequences driven by site access, crane availability and concrete cure times
  • Material traceability from mill test reports through serial numbers on each beam and panel
  • High-risk lifting plans, rigging calculations and critical-lift permits
  • Weld procedures, bolt torque logs, nondestructive testing and special inspections by third-party agencies
  • Coordination with general contractor, other trades and union labor for each pour and lift day
  • Progress billing based on stored material, fabricated quantities and erected tonnages
  • Weather and wind-speed restrictions that halt crane operations

Specialist bots

  • a worker at a jobsite trailer desk comparing large rolled structural drawings against a laptop screen with a printed takeoff sheet

    Drawing and Revision Coordinator

    Log every incoming drawing revision, extract takeoffs and generate RFI lists.

    Works in: Ambitious Docs, Ambitious Sheets, Ambitious Tasks · Workflows: Drawing and revision intake

    Automates

    • Logs drawings by revision and date
    • Extracts member lists and quantities
    • Flags conflicts and builds RFI drafts
    • Maintains revision history matrix

    Stops for a person

    • Project manager approves all RFIs before sending
    • Engineer of record must stamp final drawings
  • a worker wearing safety glasses reviewing steel connection details on large format prints spread across a drafting table

    Shop Drawing and Fabrication Manager

    Convert contract drawings into approved shop drawings and detailed fabrication schedules.

    Works in: Ambitious Docs, Ambitious Sheets, Process Optimizer · Workflows: Fabrication and shop drawing coordination

    Automates

    • Assembles shop drawing submittals
    • Schedules fabrication by lead time and priority
    • Tracks heat numbers and test reports
    • Generates erection drawings with piece marks

    Stops for a person

    • Project manager and engineer approve all shop drawings
    • Fabrication releases are signed by the superintendent
  • a worker in a hard hat scanning a steel beam serial tag with a handheld device next to stacked wide-flange sections

    Materials and Inventory Expeditor

    Turn takeoffs into purchase orders, track mill deliveries and maintain yard inventory by piece mark.

    Works in: Ambitious Sheets, Ambitious Tasks, Ambitious Docs · Workflows: Material procurement and inventory

    Automates

    • Creates purchase orders from takeoff
    • Tracks lead times and delivery status
    • Updates yard inventory and receiving logs
    • Prepares stored material reports for billing

    Stops for a person

    • Purchasing manager approves and signs all purchase orders
    • Superintendent verifies physical receipt and condition of steel and precast
  • a worker in the cab reviewing a lift plan diagram while a rigger attaches slings to a large precast concrete panel on the ground

    Crane and Erection Sequence Planner

    Build crane schedules, lift plans and delivery sequences that respect site constraints and cure times.

    Works in: Construction Scheduler, Ambitious Sheets, Ambitious Tasks · Workflows: Crane and erection sequencing

    Automates

    • Sequences lifts by bay and floor
    • Calculates weights and rigging requirements
    • Drafts daily delivery manifests
    • Produces critical-lift checklists

    Stops for a person

    • Crane operator and safety manager approve every lift plan
    • General contractor confirms site readiness before each crane day
  • a worker using a torque wrench on a high-strength bolt connection of a steel column to beam while an inspector observes nearby

    Field Execution and Inspection Clerk

    Generate daily crew assignments, log connections, torque values, welds and inspector sign-offs.

    Works in: Ambitious Tasks, Ambitious Docs, Ambitious Sheets · Workflows: Daily field execution and inspections

    Automates

    • Creates daily piece-mark assignment lists
    • Logs bolt torque, weld and grout data
    • Compiles inspector sign-off records
    • Drafts daily progress reports

    Stops for a person

    • Superintendent and special inspectors review and sign all field logs
    • Project manager verifies reports before submission to owner
  • a worker at a desk surrounded by printed drawings highlighting steel members in different colors on a quantity takeoff spreadsheet

    Progress Billing Coordinator

    Calculate erected and stored quantities, compile backup and prepare monthly billing packages.

    Works in: Ambitious Sheets, Ambitious Docs, Ambitious Tasks · Workflows: Progress billing and change orders

    Automates

    • Calculates quantities by tonnage and piece
    • Assembles stored-material backup
    • Tracks change orders and schedule of values
    • Compiles lien waivers and test reports

    Stops for a person

    • Project manager and owner review all quantities before billing
    • Executive approves final invoice amounts
  • a worker in a hard hat and high-visibility vest reviewing weld inspection reports on a clipboard beside a freshly erected steel frame

    Compliance and Testing Clerk

    Track all required inspections, permits, certifications and compile quality records for closeout.

    Works in: Ambitious Tasks, Ambitious Docs, Ambitious Sheets · Workflows: Inspection, testing and permit tracking

    Automates

    • Maintains inspection and permit calendars
    • Tracks weld procedures and test results
    • Assembles final as-built and certification packages
    • Flags expiring licenses and permits

    Stops for a person

    • Project manager confirms which local and agency requirements apply
    • People perform all sign-offs and certifications; the bot never certifies compliance

Workflows

Drawing and revision intake

Starts when: New contract award or revised drawings received from GC or engineer

  1. Log incoming structural and architectural drawings by revision and date
  2. Compare against contract documents and flag discrepancies
  3. Extract steel and precast member lists with sizes, grades and quantities
  4. Create a material takeoff and flag long-lead items
  5. Draft RFI list for missing or conflicting information

Watch for: Every drawing revision must be tracked and old versions archived; Engineer approvals required before fabrication can begin

Fabrication and shop drawing coordination

Starts when: Approved drawings and material takeoff complete

  1. Generate shop drawing submittal packages for beams, columns, connections and precast panels
  2. Schedule fabrication by priority and lead time for steel mill and precast plant
  3. Track material test reports and heat numbers for each member
  4. Coordinate galvanizing, painting and fireproofing sequences
  5. Produce erection drawings showing piece marks, bolt types and weld symbols

Watch for: Fabrication cannot start until engineer stamps shop drawings; Mill and precast plant capacities dictate production windows

Material procurement and inventory

Starts when: After material takeoff and on a weekly cadence

  1. Explode takeoff into purchase orders for steel shapes, plate, fasteners, precast concrete and embeds
  2. Track mill and supplier lead times against erection schedule
  3. Maintain yard and laydown inventory by piece mark and serial number
  4. Record receiving inspections and damage reports
  5. Update stored-material quantities for progress billing

Watch for: Traceability from mill certificate to installed member is mandatory; Large steel orders require early commitment and storage planning

Crane and erection sequencing

Starts when: Four weeks before scheduled steel or precast delivery

  1. Build daily crane schedule by bay or floor considering wind and concrete cure
  2. Produce lift plans with rigging diagrams, weights and critical-lift checklists
  3. Coordinate with GC for site access, temporary bracing and other trades
  4. Assign piece marks to each truck load and draft delivery manifests
  5. Create pre-erection safety and permit checklists

Watch for: Crane capacity, radius and boom length must be verified for each lift; Wind speed and weather forecasts can cancel or reorder lifts

Daily field execution and inspections

Starts when: Each erection or pour day

  1. Generate daily crew and equipment assignment list with piece marks
  2. Log bolt torque, welds performed, grout placements and panel alignments
  3. Record special inspector sign-offs and nondestructive test results
  4. Capture as-built photos and survey data for each connection
  5. Draft daily reports for GC and owner

Watch for: Third-party inspectors must sign off before proceeding to next bay or floor; All torque, weld and grout records must be traceable to specific members

Progress billing and change orders

Starts when: End of each billing period and when change orders arise

  1. Calculate quantities fabricated, delivered, stored and erected by tonnage and piece
  2. Draft schedule of values update with stored material backup
  3. Track change order impacts on material and labor
  4. Compile all test reports, inspection logs and lien waivers
  5. Prepare billing package for GC approval

Watch for: Billing quantities must match engineer-approved drawings and field measurements; Lien waivers and conditional releases required before payment

Inspection, testing and permit tracking

Starts when: Weekly and on milestone dates

  1. Maintain master list of required special inspections, weld procedures and bolt testing
  2. Track expiration dates for crane certifications, operator licenses and site permits
  3. Compile final as-built drawings, material certifications and inspection reports
  4. Flag any outstanding RFIs or deviations for engineer resolution
  5. Archive all quality records for project closeout

Watch for: Local building department and special inspection agencies set the exact requirements; All records must be available for audit at any time

Bot templates for this industry

Source: U.S. Small Business Administration, Office of Size Standards, Table of Small Business Size Standards Matched to North American Industry Classification System Codes, version March 2023 (effective 2023-03-17, NAICS 2022). Size standards are shown for reference only.